Siren.



P. BOSSU.

SIREN.

APPLICATION FILED JULY 1. I913- Lfili 1 51b Patented Jan. 23, 1917.

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P. BOSSU.

SIREN.

APPLICATION FILED JULY 1. L913.

Patented $1111.23, 1917.

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SIREN.

APPLICATION FILED JULY 1. 1913.

Patented Jan. 23, 1917.

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SIREN.

APPLICATION FILED JULY 1.1913.

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PIERRE BOSSU, 0F PARIS, FRANCE, ASSIGNOR T0 SOCIETF; ANONYME IDES ETABLISSE- MENTS L. BLERIOT, OF PARIS, FRANCE.

SIREN.

Specification of Letters Patent. l

Patented Jan. 23, lint t.

To all whom it may concern Be it known that T, PIERRE lBossU, a citizen of the French Republic, residing in Paris, France, have invented certain new and useful Improvements in Sirens, of which the following is a specification.

This invention relates to improvements in sirens andsimilar apparatus, and more particularly to apparatus of the kind employing a sound producer comprising a continuously revolving member, a valve to intercept and release at will the flow of the active or operating fluid in the sound producer, and a stationary member.

The chief object of the present invention is to enable apparatus of this character to operate more eficiently to produce the desired sound practically instantaneously, and to cease sounding practically instantaneously whereby such apparatus may be operated to produce long and short notes according to a code such, for example, as used in telegraphy, the apparatus then serving as an audible signal.

Another object of the invention is to provide apparatus of this class having greater power and consequently longer range.

The invention consists chiefly in arranging the controlling valve for the sound producer between the continuously revolving member and the stationary member of the sound producer; in providing for such means a part which moves continuously during the working of the apparatus; in providing a fan embodying a plurality of fan elements mounted in a series on the same spindle and arranged so that they force the air parallel to their axis of rotation; and in providing one or more openings to enable the active fluid to escape freely when the controlling valve of the apparatus is in a position in which it cuts off the operating fluid from the sound producing means of the apparatus.

The invention consists further in providing the sound producing means with several difierent series of holes, and in providing means to enable each series of holes to be rendered operative or inoperative at will.

The invention will be more clearly understood from the following description, as well as from the accompanying drawing which, however, is merely given as an example of the invention.

Figure lshows, in longitudinal section, a

siren haying a mechanically controlled valve embodylng one mode of carrying out the invention. Fig. 2 shows a siren having an electrically controlled valve embodying another mode of carrying the invention into practice. Fig. 3 shows, partlyin elevation and partly in vertical section on line 3-3 of F g. 2, the upper portion of siren shown 1n Fig. 2 having the controlling system applied thereto. ig. 4c shows diagrammatically another form of valve controlling means embodying the present invention. Fig. 5 shows a portion of the same in vertical section. Fig. 6 is a view similar to Fig. 2 showing a siren embodying another mode of carrying out the invention. Fig. 7 is a view similar to Fig. 1 showing a siren embodylng my invention and so designed that it will produce three difi'erent sounds.

The accompanying drawings show the present invention applied to a siren having a sound producing device comprising a constantly rotating member, a valve to control the flow of the operating fluid to the said sound producing device, and a stationary member.

lit comprises, as shown in the drawings, a

cylindrical casing a which constitutes the stationary member, the latter being provided with a cylindrical portion having holes a, and it is also provided with suitable means for supporting it in fixed position.

A. second cylindrical. casing 12 constitutes the rotary member, the latter having an outside diameter smaller than the inside diameter of the cylindrical portion of the casing a, and is provided on its cylindrical portion with holes 6 of the same kind as the said holes a", and its cover 5 is provided with means for securing it to a rotary spindle (Z. The cylindrical casing b is preferably provided with an axial hub or sleeve 5 forming an extension ofits cover 6', and it has strengthening ribs 6 arranged between the said cover I) and the axial hub or sleeve 6 A cylindrical member a constitutes the valve, it having outside and inside diameters of such dimensions that it fits between the cylindrical portions of the cylindrical casrotary cylindrical casing and is preferably provided with an extension d which is supported by a thrust ball-bearing e in the cover a of the outer or stationary casing a.

may be actuated in any suitable manner to shift the cylindrical-valve or member crelatively to the outer cylindrical casing a.

A continuously moving part such, for instance, as the rotary member I), can be used to. actuate the valve, a suitable clutch being provided which enables the valve to be adjusted by the rotary member 5. In the construction shown in Figs. 2 and 3, a clutch, brake or similar device 9 is arranged between the bottom face of the cover 0 of the valve 0 and the upper face of the cover I) of the rotary member 6, this clutch or brake having on the surface thereof facing the said upper face a clutch 0r brake shoe g of any material with a high co-eflicient of friction such, for example, as cork or rubber, and it has on its opposite face a rod 9 which passes through a corresponding hole 0 provided in the cover of the valve and through a circular slot a in the cover a. This rod g is subjected to the action of a spring 9 secured to the valve 0 whereby it has a tendency to re main away from the upper face of the cover I) of the rotary member I). On the cover a of the stationary casing member a is arranged an electro-magnet h, the armature h of which is connected to a plate 2' which latter is mounted to oscillate between the pivots 6. When the armature h is attracted, pressure is applied to the upper end of the said rod 9, preferably through the medium of a roller carried by said rod, to bring the said clutch or brake 9 into engagement with the upper face of the cover I) of the rotary member I) and thereby cause rotary adjustment of the valve 0 by the rotary member. A hole 71 is provided at such a point in the plate 2' that, when the rod 9 has been turned by the rotary member to a point where the holes of the valve coincide with the holes a of the stationary member a, said rod will enter or engage in such hole owing to the action thereon of the spring 9 the clutch or brake 9, 9 being thereby shifted out of engagement with the rotary member and hence the driving of the valve is interrupted. The valve is held in open position by the engagement of the rod 9- within the hole i. A rod 0 is secured to the valve and projects upwardly through a slot in the cover of the stationary member where it is connected to a spring j, the latter being attached to a fixed part of the siren whereby, when the armature h is released and consequently the plate a rises, the rod 9 is disengaged from the hole z" in said plate and the valve 0 is returned to normal closed position by' the action of said spring.

In Figs. 4 and 5, the driving or adjusting of the valve 0 by the rotary member I) is controlled by a series of teeth I) on the rotary member and cooperative with an opposite series of ribs of on the valve, the reaction of the air and of. the ribs havingthe tendency to drive the valve in the direction of rotation of the rotary member. The controlling of the valve, whereby it may be set in open and closed positions, is effected, as shown, by an escapement 7a which is pivoted to a pin is securedto the stationary member a and provided with an extension 70 which carries an armature h of an electro-magnet h, the latter being secured to the stationary member a. The escapement is provided with a spring 3', the latter being attached to the stationary member of the casing, said spring acting to bring the armature it into its released position. Teeth 0 are arranged in such manner on the upper cover of the valve that for each oscillation of the armature h (attraction or release) one of the pawls 70 or 70 of the escapement will be disengaged from the said teeth 0, the valve turning with the rotary member, and the other pawl k or is will engage the next succeeding tooth. The pitch of these teeth is such that whenever the armature is attracted, the pawl 70 will stop the valve 0 in a position in which its holes 0 register with the holes a, and when the armature h is released, the pawl 70 will stop the valve in a position in which it closes the holes a.

In the constructions just described, the electro-magnet k is connected to a switch Z 1n such manner that, in order to control the movements of the valve, it is only necessary to operate the switch either to close or open an electriccircuit; or, as shown, the current may pass continuously through the magnet Z, and a resistance Z can be switched into the circuit to effect a reduction of strength of the current just sufficient to produce the release of the magnet armature.

The present invention also provides means for supplying air to the sound producer, it consisting in the present instance Laravsa tit moisture such, for example, as that caused by sea spray or high waves, into the interior of the fan. preferably provided in the casing at suitable points to enable any water that may have entered the fan to drain therefrom.

Blades n are mounted in the casing 97;, these blades being secured to the extension (Z of the spindle d, this extension projecting beyond the lower end of the casing m and is supported by means of asecond thrust ball-bearing e, the same being contained in a cover m and said extension d is connected to a driving motor 0. Supplementary blades 0 are provided on the inner wall of the casing m to insure proper efficlency of the fan which, as shown, has successive compression stages.

In the operation of a-siren constructed as hereinbefore described, the valve 0 first occupies a position where it closes the holes a"; the motor is then started before it is desired to produce the sound, the motor running continuously during the time that the siren is in use, and each time that it is desired to produce a sound, the valve is set so as to uncover the holes a, the valve remaining in such position as long as the sound should continue.

If desired, one or more openings can be made in the siren to allow the operating fluid to escape when the valve is in closed position. In the construction shown in Fig. 6, the cylindrical casing a 1s provided with one or more openings a below the lower end of the revoluble member 6, the aggregate capacity of the said openings being practically equal to that of the aggregate capacity of the holes a", and means is provided for closing the openings a when the valve is in open position, and for opening them when the valve is in closed position. Different means may be used for accomplishing this purpose. As shown in the drawing, thecylindrical casing constltutlng the valve extends beyond the lower end of the rotary member, and this extension of the valve is provided with openings 0", preferably of a number and capacity equal to the openings a of the stationary member, the arrangement being such that the openings a will register with the openings a only when the holes 0 are out of register with the holes a". When the valve is in position to cut ofl the operating fluid from the sound producer, such fluid escapes freely through the openings a without making the least noise; it does not collect under pressure in the interior of the cylindrical casings, and it has no tendency to escape, with a more or less strong whistling, through the spaces which might exist between the casings. It is thus possible to leave a certain play between the valve and Small holes m are also the stationary casing member instead of fitting them exactly to one another; the construction is thus simplified, the operation of the valve is facilitated, and there is less danger of it becoming choked. More over, when the valve cuts ofl the flow of the operating fluid from the sound producer of the siren, the resistance to the r0- tation of the rotary member is not modified, and the speed of rotation of the motor driving the said rotary member is therefore not affected.

As shown in Fig. 7, both the casing member a and the rotary member I) are provided with series of corresponding supplementary holes a", a and a and 6, 6 and 6 respectively. The valve 0 is subdivided into a plurality of sections a, c and a corresponding to the different series of holes in the members aand b. The holes 0 are adapted to register with the openings a, and the holes 0 and 0 are adapted-to register with the holes (1 and a each series of holes being of a diflerent number whereby they will produce sounds of diflerent characters. Means similar to those hereinbefore indicated can be used for controlling separately each of the valve sections 0, c and 0 Where an electric motor is used to drive the rotary member, the cooling of the motor is preferably effected by the operating fluid, either by causing it to enter holes m and m and to pass through the motor chamber before reaching the fan, or by causing such fluid to pass through tubes 0 arranged in the interior of the motor, and in these cases the holes m may be dispensed with.

What I claim as my invention and desire to secure by Letters Patent is 1. A siren, comprising a drum-shaped stator, a continuously rotating drum-shaped rotor, and a drum-shaped valve inserted between the rotor' and the stator and adapted to intercept and release at will the active fluid in the said rotor and stator.

2. A siren comprising a stationary ported member, a continuously moving part, and a valve cooperative with the stationary ported member and adapted to intercept and to release at will the active fluid relatively to the stationary ported member, the valve being driven by said continuously moving part.

8. A siren, comprising a stator, a continuously rotating rotor, a valve inserted between the rotor and the stator and adapted to intercept and release at will the active fluid in the said rotor and stator, and a brake blockcarried bysaid valve adapted to engage the rotor and so drive the valve.

4. A siren, comprising a stator, a continuously rotating rotor, a valve inserted between the rotor and the stator and adapted to. intercept and release at will the active fluid in the said rotor and stator, a brake block carried by said valve adapted to engage the rotor and so drive the valve, a rod supporting said brake block, a magnet, an

armature having a recess and adapted to be attracted by said magnet and to act on the rod when so attracted to cause said brake block to engage said rotor, means whereby when the valve has rotated to the required .e tent,the rod engages with said recess in the" armature, and a spring adapted to return the valve to its closed position When the armature is not attracted.

5. In a siren, the combination of relatively revoluble members 'having ports therein, and a valve actuated by one of said members for controlling the ports of the members.

6; In a. siren, the combination of relatively movable members having ports therein, a valve for controlling the ports of said members, and an electrically controlled clutch to transmit motion from one of said members to said valve to adjust the latter.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses'. PIERRE BOSSU.

Witnesses:

HANSON C. Coxn, PAUL BLUM. 

